Apparatus for hardening the flanks of spindle and worm threads



F. KLOPP Nov. 8, 1932.

APPARATUS FOR HARDENING THE FLANKS OF SPINDLE AND WORM THREADS Filed March 6, 1930 Patented Nov. 8, 1932 I .UETED was PATENT oFFIcs FRIEDRICH KLOPP, OF WALD, GERMANY Application filed March. 6, 1930, Serial EH This invention relates to an apparatus for hardening spindleand worm threads and the like, in which the screwand worm threads to be hardened are immersed .up to the middle 5 of the spindle in the quenching liquid of a quenching tank and, continually rotated in said liquid, the flanks of the threads being heated above the surface of the quenching liquid by a pointed=flame of an autogenous or other suitable burner which engages by means of a fitted block with the thread of the spindle and is thus moved along'the spindle.

An embodiment of the invention is illustrated by way of example in the accompany ing drawing in which:

Fig. 1 shows the apparatus in elevation partly in section.

Fig. 2 is a section on line 2-"-2 of Fig. 1. I On one end of a quenching tank as a bracket 6 is arranged in which a clamping chuck c is mounted, which is driven by a worm Wheel d and worm e. The spindle f, the thread.

flanks of which have to be hardened, is r clamped at one end in the clamping chuck 0 and at the other end guided in a bearing 9, fixed on the other end of the quenching tank a. The spindle f is immersed up to its mid dle into the quenching liquid in the tank a.

In a bearing 72 mounted on the end of tank a on which thebracket b is arranged, an axle z'is guided. On this axle i an arm m is loosethe screw threads of spindles, Worms and the 433,777; and in Germany March 12, 1929. q

'vided against which the handle 0 of the cock in" the gas pipe n strikes so that the cock is turned and the gas supply shut ofi. This stop might be constructed in such a manner that the block 1 of the burner is is simultaneously lifted out ofi the thread of the spindle f.

Iclaim: f

An apparatus for hardening the fianksof like, comprising in combination a quenching tank, bearings in said tank adapted to hold and rotate the work of which the flanks of the screw threads are to be-hardened, a guide \mounted on said axle, and a fitted block on said burner adapted to engage in the screw thread of the work and to automatically feed said burner alon said axle owing to the rotation of the Wor FRIEDRICH KLOPP.

.ly mounted which carries on'its free *end an autogenous burner k. The gas is supplied to.

35 the burner k from a gas pipe a, the cock in the gas pipe being controlled by a handle 0.

, I A fitted block Z ofithe-burner k engages with the thread of the spindle f.

' The thread flanks of spindle f are hardened in that the burner is is'moved along the spindle, when this spindle is being rotated, the flanks being successively heated to the desired temperature by'the pointed flame from the burner 70 from one end of the spindle to the other end of the same and instantaneous- I i 45 1y quenched at the heated p fi For multi-thread spindles the burner k I is constructed accordingly. I In order that'at the endof the spindle thread the burner is be automatically rendered.

'inefiective, a stop or abutment may be pro- 

